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Excitation of Electron Plasma Wave by Self Focused Cosh-Gaussian Laser Beams in Collisionless Plasmas: Effect of Density Ramp
Abstract
Dynamics of the laser driven electron plasma waves (EPWs) in plasmas with axial density ramp has been investigated theoretically. The effect of self-focusing of the laser beam on the power of laser excited EPW has been incorporated. During its propagation through the plasma, the laser beam excites an EPW at frequency ωep that due to the optical nonlinearity of plasma gets nonlinearly coupled to the laser beam. Using variational theory semi analytical solutions of the coupled nonlinear wave equations for the pump wave and EPW have been obtained under W.K.B. approximation technique. It has been observed that power of the EPW is significantly affected by the self-focusing effect of pump beam.
About the Authors
N. Gupta
Department of Physics, Lovely Professional University
India
India
Phagwara
S. Kumar
Department of Physics, Government College for Women
India
India
Karnal
S.B. Bhardwaj
Department of Physics, SUS Govt. College
India
India
Matak-Majri, Karnal
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Review
For citations:
Gupta N., Kumar S., Bhardwaj S. Excitation of Electron Plasma Wave by Self Focused Cosh-Gaussian Laser Beams in Collisionless Plasmas: Effect of Density Ramp. Zhurnal Prikladnoii Spektroskopii. 2023;90(1):120. (In Russ.)
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